Marshalling an Array of struct from DispInterface C++ COM to a C# Client

Hello Peter,

1. You mentioned in the OP that the returned VARIANT contains a SAFEARRAY of DispInterfaces, hence I expected that the MatchedItem structure would be wrapped inside a class that implements the dispinterface.

2. Hence the answer to the question in your last post is : no.

3. Although you can create a SAFEARRAY that contains structures (provided that it is defined with a GUID in the IDL), it cannot be marshaled successfully to .NET if the array is to be contained in a VARIANT.

4. My suggestion is to create a C++ class that implements dispinterface and use it to represent the MatchedItem structure.

- Bio.

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